8 results about "Nanoring" patented technology

The application discloses a superconducting diode device based on a single-layer niobium nitride nanoring and a control method thereof, and belongs to the technical field of superconducting electronics. The superconducting diode device comprises an insulating substrate and a niobium nitride layer. The niobium nitride layer comprises a first working line, a second working line and an intermediate ring. The first working line comprises a first line segment, a second line segment and a first intermediate part. The second working line comprises a third line segment, a fourth line segment and a second intermediate part. The intermediate ring is connected with the first intermediate part and the second intermediate part. The application uses a single-layer niobium nitride film, and realizes a structure of a superconducting diode with a minimum size and a single layer by means of the action of a nanoring with geometric asymmetry and an external magnetic field. The device size is greatly reduced, which is conducive to high-density integration and miniaturization application, and conducive to realizing low-power consumption and high-speed rectification control. The difficulty of material and interface control is greatly reduced. The process flow is simple and has good repeatability, which is conducive to reducing the preparation cost and improving the consistency of the device.

The invention discloses a high-entropy nano environmental catalytic material as well as a preparation method and application thereof, the catalytic material is prepared by taking SiO2 as a substrate and a Fe2O3-Co3O4-NiO-CuO-ZnO composite oxide as a component and adopting a combined method of magnetron sputtering coupling solvothermal, ultrasonic-assisted electrochemical deposition, microwave hydrothermal in-situ self-assembly and plasma-assisted ozonation. The catalytic material is environment-friendly, rich in active interface and high in specific surface area, can efficiently catalyze and degrade organic pollutants such as chlorobenzene at low temperature, and has a wide market application prospect.

The application relates to the technical field of photocatalysis and heavy metal treatment, and particularly discloses a method for photocatalytic reduction of hexavalent chromium, which comprises the following steps: mixing a photocatalyst with a hexavalent chromium solution, adjusting the pH value to 1-7, stirring, and irradiating; wherein the photocatalyst is a bismuth molybdate nanoring; the method uses the novel bismuth molybdate nanoring as the photocatalyst to efficiently reduce the hexavalent chromium for the first time, the reaction rate is fast, the photocatalyst can be recycled, the method is green and environment-friendly, and the cost is low.

The invention discloses a superconducting diode device based on a single-layer niobium nitride nanoring and a control method thereof, and belongs to the technical field of superconducting electronics, the superconducting diode device comprises an insulating substrate and a niobium nitride layer, the niobium nitride layer comprises a first working line, a second working line and an intermediate ring, the first working line comprises a first line segment, a second line segment and a first middle part, the second working line comprises a third line segment, a fourth line segment and a second middle part, and the middle ring is connected with the first middle part and the second middle part. According to the invention, the single-layer niobium nitride thin film is used, and by virtue of the effects of the geometrically asymmetric nano circular ring and an external magnetic field, a superconductive diode structure with an extremely small structure and a single layer is realized, so that the size of the device is greatly reduced, high-density integration and miniaturization application are facilitated, and low-power-consumption and high-speed rectification control is facilitated to be realized; the difficulty of material and interface control is greatly reduced; the process flow is simple, the repeatability is good, the preparation cost is reduced, and the device consistency is improved.

The invention discloses a method for efficiently synthesizing a D2 symmetric chiral conjugated carbon nanoring, which comprises the following steps: by taking planar chiral cyclophane diamine as a starting point, obtaining an intermediate D2-(P)-PtNR3 at the yield of 86% through pre-bending a fused ring unit and platinum-mediated cyclization, removing Pt, and then obtaining a target chiral conjugated nanoring molecule D2-(P)-NR3 at the high yield of 75%. And meanwhile, the enantiomer D2-(M)-NR3 is obtained with high yield by the same synthesis method. The synthesis method solves the problems of low yield, difficult chiral control, tedious separation and purification and the like in the traditional macrocyclic synthesis.

The invention belongs to the technical field of electromagnetic wave absorber composite materials, and relates to a Fe3O4 / MXene composite material and a preparation method and application thereof.The preparation method comprises the steps that a Fe2O3 nanoring is prepared firstly, then the nanoring and MXene are added into deionized water to be stirred, and the Fe2O3 nanoring is attached to MXene through a hydrothermal method. And finally, carrying out high-temperature annealing on the Fe2O3 nanoring / MXene, so as to prepare the Fe3O4 nanoring / MXene composite material. According to the preparation method, a hydrothermal method and a high-temperature annealing method are adopted, and the Fe3O4 nanoring / MXene composite material is prepared by taking Fe2O3 nanoring / MXene as a precursor. According to the special ring / sheet structure, the Snoek limit can be broken through due to the nanoring with the special vortex magnetic structure, and meanwhile the dielectric loss is improved through the introduced two-dimensional dielectric material. A microwave absorption performance result shows the practical application possibility of the sample.

This invention provides a multi-turn silver nanoring and its preparation method, belonging to the field of metal nanomaterial preparation technology. The invention first mixes a polyvinylpyrrolidone (PVP) glycol solution with pyridine to obtain a mixed solution; then, the mixed solution, a sodium halide glycol solution, silver nitrate, and sodium nitrate are mixed, followed by a solvothermal reaction and precipitation separation to obtain multi-turn silver nanorings. The method for preparing multi-turn silver nanorings is simple, easy to implement, has good reproducibility, and high yield. During the preparation process, the addition of the organic solvent pyridine enables the silver nanowires to bend and grow significantly to form multi-turn silver nanorings.